Brake-valve device



A. W. RENDELL. BRAKE VALVE DEVICE.

ICATION FILED NOV 0 v A 918. 1,403,870, I Patented Jan. 17, 1922.

1 F 9 w ll NNNNNN OR Alan Randell UNITED STATES PATENT OFFICE.

ALAN W. RENDELL, OF LONDON, ENGLAND, ASSEGNOR- TO THE WESTINGHOUSE AIRBRAKE COMPANY, OF \VILMIERDING, PENNSYLVANIA, A CORPORATION OF PENN-SYLVANIA.

BRAKE-VALVE DEVICE.

Application filed November 30, 1918.

To all whom it may concern:

Be it known that I, ALAN W RnNnnLL, a subject of the King of GreatBritain, and a resident of 10 Kensington Palace Mansions, De VereGardens, London, England. have invented a certain new and useful Improvement in Brake-Valve Devices, 01 which the following is aspecification.

This invention relates to valve operating devices, and more particularlyto the type .employed in connection with engineers brake valves, inwhich a rotatable spindle or shaft is connected to the valve and isadapted to be operated by a handle or lever.

It has heretofore been customary to actuate the valve spindle by meansof a handle mounted directly, and usually removably, on the projectingend of the spindle, and in order to define the various operatingpositions of the valve and handle, it is usual to provide a springpressed stop in the handle, which is adapted to engage corre spondingrecesses formed in the adjacent section of the valve casing.

The power stored in the spring operates through the handle to produce aside pres sure on the spindle, which after a time causes the spindle towear unevenly in its bearing and also causes uneven wear on the leatherseating usually employed to prevent leakage, and this wear isaccentuated by the one-sided pressure of the operators hand inmanipulating the handle.

By reason of the uneven wear above rererred to, leakage of fluid underpressure around the spindle is very liable to occur.

The principal object of my invention is to provide means for overcomingthe above defects.

In the accompanying drawing; Fig. 1 is a vertical sect-ion of anengineers brake valve embodying my invention; Fig. 2 a plan viewthereof; and Fig. 3 a partial section on the line 3-3 of Fig. 1.

The brake valve device shown in the drawing comprises a casing 1 havinga valve chamber 2, containing the usual rotary valve 3 adapted to beoperated by a rotatable spindle or shaft 4.

The lower end of the spindle at is provided with a flange 5 adapted toengage and make Specification of Letters Fatent.

Patented Jan. 1?, 1922.

Serial No. 264,870.

an air-tight joint with a leather seat 6, while the upper end of thespindle is provided with an adjusting nut 7 and a lock-nut 8.

The upper end of the spindle is made polygonal. and according to myinvention, has mounted thereon a cap 9 having downwardly projecting anddiametrically oppo site lugs 10, 10.

The brake valve handle 11 is provided with a hubportion 12 having acircular bore adapted to easily fit over a corresponding neck portion 13provided at the upper end of the casing 1 and terminating in a shoulderupon which the hub portion of the handle rests, the hub portion beingsecured in position, by the nut 7.

On the upper face of the hub portion 12 are provided diametricallyopposite lugs L1 forming recesses within which the lugs 10 engage.

Within the handle is mounted the usual stop 15, acted upon by spring 16,and adapted to engage notches formed on the periph cry of the casing 1.

It will now be seen that with the above described construction, sidepressure due to the spring 16 and also pressure due to the liftingaction of the operators hand on the handle is not transmitted to thevalve spindle 1, since there is lost motion present, in a verticalplane. between the handle 11 and the lugs 10. In the plane of rotation,however, there is positive engagement between the handle and the lugs10, so that the spindle & may be rotated by the handle in eitherdirection.

Having now described my invention, what I claim as new and desire tosecure by Letters Patent, is

1. The combination with a valve, a fixed casing containing said valveand having a cylindrical bearing, and a rotatable spindle for operatingsaid valve, of a handle rotatably mounted on said bearing, a membersecured to said spindle and in operative engagement with the handle totransmit force only in the plane of rotation.

2. The combination with a valve, a fixed casing containing said valveand having a cylindrical bearing, and rotatable spindle for operatingsaid valve, of a handle rotatably mounted on said bearing, a-1118I1'lb6l table spindle for operating said Valve, of a 10 secured tosaid spindle, and an operative handle rotatably mounted on said casingconnection between the handle and said and having recesses, and a capsecured to member "for transmitting force in the plane said spindle andprovided with lugs for 5 of rotation and adapted to permit relativeengaging Within said recesses.

movement between the parts in a plane In testimony whereof I havehereunto set 15 transverse to the plane of rotation. my hand.

3. The combination With a Valve, a fixed i casing containing said valve,and a rota- V ALAN V. RENDELL.

